I have been working on my 60 year-old garage for the past few days and
sort of wonder about the A-frame construction that was used. The roof
is supported by 2x6's on 16 inch centers. Then there are three 2x4
spans across the garage to form the bottom of the "A" in addition to
the tops of the two end walls -- so a span about every five feet. Due
to water leaks two of these 2x4's are pulling loose and I am working
to pull them back into position and attach them more securely with
screws and or bolts. I wonder how this differs from what would be
build today? Thanks.
The problem isn't the 2x4's; they've certainly got more than enough
strength in tension. The weakest point is almost certainly the
connection not the material.
The problem is as your first posting noted the effects of a leak over
the years causing the joint to fail or perhaps the ends have also enough
damage overall besides simply at the nailed (presuming) locations.
If you pull it back in shape and gusset it up back to solid material
including a scab or two if needed to provide solid material and then fix
the roof leaks it should last indefinitely.
If you're really ambitious, add an additional one between the existing. :)
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